c++ – Passing text through a condition in a program loop. C ++ Winapi

Question:

I wrote a small program. Which saves the text from EditControl to a file. Everything is simple in general. But I need to substitute certain values ​​in the text that are given in the array of the program itself. In the console version, everything was simple for me, but here I was a little lost. There is such a condition that alphabetic values ​​are substituted instead of the numbers typed in EditControl. Instead of 1 – X, 2 – Y, 3 – A, 4 – B. For example, typing a line in Control Edit B + 3,2,1, DB2. The following result B + A, Y, X, DBY has already been written to the file. What exactly am I lost in? So the fact is that I can not figure out where to substitute this cycle for replacing elements in the array. Help who can. I've been suffering with this for a week now.

#include <Windows.h>
#include <iostream>
#include "resource.h"

using namespace std;

#define ESC_OF "Отказ от выбора или ошибка выполнения функции "

HWND hEdit1;
HWND hEdit2;

CHAR text_1[] = { 0 };
CHAR text_2[] = { 0 };

BOOL CALLBACK DlgProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );

int CALLBACK WinMain( HINSTANCE hInstance, HINSTANCE hPrevInst, LPSTR lpCmdLine,
                      int nCmdShow )
{
    DialogBoxParam( hInstance, MAKEINTRESOURCE( IDD_DIALOG1 ), 0, ( DlgProc ), 0 );
    return 0;
}

BOOL CALLBACK DlgProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    BOOL success;
    static OPENFILENAME ofn;
    static char szFile[MAX_PATH];

    switch( uMsg ) {
        case WM_INITDIALOG: { // Добавление компонентов на форму
            // Инициализация структуры ofn
            ofn.lStructSize = sizeof( OPENFILENAME );
            ofn.hwndOwner = hwnd;
            ofn.lpstrFile = szFile;
            ofn.nMaxFile = sizeof( szFile );
            ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0";
            ofn.lpstrDefExt = "txt";
            //Иконка
            HICON hIcon1 = LoadIcon( GetModuleHandle( NULL ),
                                     MAKEINTRESOURCE( IDI_ICON1 ) );
            SendMessage( hwnd, WM_SETICON, 1, ( LPARAM )hIcon1 );
            //Текстовые поля
            hEdit1 = GetDlgItem( hwnd, IDC_EDIT1 );
            hEdit2 = GetDlgItem( hwnd, IDC_EDIT2 );
            SetWindowText( hEdit1, text_1 );
            SetFocus( hEdit1 );
            break;
            return TRUE;
        }

        case WM_COMMAND: // Обработка кнопок и нажатий
            switch( LOWORD( wParam ) ) {
                case IDC_BUTTON1:
                    strcpy_s( szFile, "" );
                    success = GetSaveFileName( &ofn );

                    if( success ) {
                        MessageBox( hwnd, ofn.lpstrFile,
                                    "Файл сохранен под именем:", MB_OK );
                        HANDLE hFile = CreateFile( ofn.lpstrFile,
                                                   GENERIC_WRITE,
                                                   FILE_SHARE_WRITE,
                                                   NULL,
                                                   CREATE_ALWAYS,
                                                   FILE_ATTRIBUTE_NORMAL,
                                                   NULL );
                        const int size = 2048;
                        TCHAR buff[size] = { 0 };
                        hEdit2 = GetDlgItem( hwnd, IDC_EDIT2 );
                        DWORD off = 0;

                        do {
                            GetWindowText( hEdit2, buff, size );
                            WriteFile( hFile, buff, size, &off, NULL );
                        } while( off < 0 );

                        CloseHandle( hFile );
                    }
                    else {
                        MessageBox( hwnd, ESC_OF"GetSaveFileName",
                                    "Отказ от выбора или ошибка", MB_ICONWARNING );
                    }

                    break;

                case IDOK:
                    MessageBox( hwnd, "Была нажата кнопка ОК", "Info",
                                MB_OK | MB_ICONINFORMATION );
                    break;

                case IDCANCEL:
                    EndDialog( hwnd, 0 );
                    return FALSE;
            }

            break;

        case WM_CLOSE:
            EndDialog( hwnd, 0 );
            return FALSE;
    }

    return FALSE;
}

Answer:

In the button click handler case IDC_BUTTON1: there is a loop:

do {
    GetWindowText( hEdit2, buff, size );
    WriteFile( hFile, buff, size, &off, NULL );
} while( off < 0 );

GetWindowText () – takes the text from the control and adds it to the buff array. WriteFile () – Writes this buff array to a file.

Accordingly, between these two function calls, you need to correct the buff content as you need (i.e. insert a cycle for replacing characters).